2. Check the availability of disk on TEST environment.
Note: If sufficient space available then proceed otherwise raise request to Linux/Unix team

3. Check connectivity on TEST environment

E.g check TNSPING PROD, RMAN CATALOG

4. Take full backup of TEST environment.

E.g Cold backup/EXP full/EXPDP full

5. Match the user of TEST environment with the PRODUCTION Environment.
Note: If user same for both TEST and PROD Environment, then proceed further.
If USER are different take backup of TEST database user separately with expdp.
select count(*) from dba_users;

8. Make duprefresh.rcv command file:
Go to production database run the following script
Change the location in replace function according to test. It will give you all data files detail.
select 'set newname for datafile '||file#||' to "'||
replace(name,'/local/data/oracle/PROD/datafiles/','/data10/oradata/TEST/')||"';' from v$datafile ;